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【单选题】
某弱酸性药物在pH7.0溶液中90%解离，其pKa值约为：A.
6
B.
5
C.
8
D.
7
E.
9
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举一反三
【单选题】With the help of our teacher we can speak English ___ more fluently than ever before.
A.
quite
B.
much
C.
so
D.
very
【单选题】MOOC是以下( )的缩略语。
A.
Massive Open Online Classes
B.
Massive Open Offline Courses
C.
Massive Open Online Courses
D.
Massive Online Open Courses
【简答题】With the help of our guide, we finally to the top of the mountain.
【简答题】什么是爆燃?对发动机工作有何危害?
【简答题】With the help of our guide, we finally__________to the top of the mountain.
【简答题】With
the help of our guide, we finally
to the top of the mountain. (make it)
【单选题】Workers who have to work on weekends are paid twice the normal wages. And _____ national holidays, they get triple pay.
A.
faced with
B.
engaged in
C.
i n the case of
D.
turning the tide against
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